Photometric study of the close binary system DD MonocerotisShengbang Qian, Qingyao Liu, Yulan Yang, Shenghong Gu and Zhangkui HuangAstron. Astrophys. Suppl. Ser., 125 3 (1997) 475-478DOI: https://doi.org/10.1051/aas:1997235